Stent for the positioning and anchoring of a valvular prosthesis

摘要

An expandable stent for an endoprosthesis used in the treatment of a narrowing of a cardiac valve and/or a cardiac valve insufficiency for reducing longitudinal displacement of a valvular prosthesis relative a stent when implanted. In one embodiment, the stent may comprise at least one fastening portion by which the valvular prosthesis is connectable to the stent. In another embodiment, the stent further comprises positioning arches and retaining arches, whereby at least one positioning arch is connected to at least one retaining arch via a first connecting land. In another embodiment, the stent may comprise at least one auxiliary arch which connects the respective arms of the at least one retaining arch connected to the at least one positioning arch.

主权项

1. An expandable stent for treating a native heart valve having a plurality of native valve leaflets, comprising:
a plurality of positioning arches configured to be positioned within a plurality of pockets of a native valve on a first side of the plurality of native valve leaflets, a plurality of retaining arches configured to support a valve prosthesis on a second side of the plurality of native valve leaflets such that the plurality of native valve leaflets are positioned radially inward of at least a portion of the plurality of positioning arches and radially outward of at least a portion of the plurality of retaining arches when the expandable stent is implanted, and a plurality of auxiliary arches, each auxiliary arch circumferentially interspaced between two adjacent retaining arches; wherein each retaining arch is associated with a corresponding positioning arch and has a distal, open end portion axially aligned, along a longitudinal direction of the expandable stent, with and joined to a distal, open end portion of the corresponding positioning arch; wherein each positioning arch, each retaining arch, and each auxiliary arch has a closed proximal end forming an apex; and wherein the valve prosthesis is attached to the plurality of retaining arches such that at least a portion of the valve prosthesis extends from the plurality of retaining arches transversely across an interior of the expandable stent.